Tin(II) bromide (stannous bromide) — SnBr2

Characteristics and structure

As with many Sn(II) halides, tin in SnBr2 carries a stereochemically active lone pair that influences geometry. In the gas phase or when coordinated to ligands, the tin is commonly two-coordinate and bent; in the solid state the material often adopts oligomeric or polymeric arrangements with bridging bromide ions. It is moderately soluble in polar solvents and can hydrolyze slowly in the presence of water.

Preparation and related compounds

SnBr2 can be produced by direct combination of elemental tin and bromine under controlled conditions or by reduction of tin(IV) bromide. It belongs to the family of stannous halides, which includes analogues such as tin(II) chloride; comparison with tetrabromide (SnBr4) highlights the change in coordination and volatility between Sn(II) and Sn(IV) species.

Uses and applications

In inorganic and organic chemistry SnBr2 is used as a reducing agent, a reagent for introducing tin into synthesis routes, and as a precursor to organotin compounds and catalysts. It is also of interest in materials research where tin-containing halides contribute to electronic or optical properties. Practical uses depend on controlled handling and compatibility with reaction solvents.

Safety, handling and notable facts

• SnBr2 is a chemical reagent that should be handled with appropriate protective equipment; avoid inhalation and skin contact and prevent environmental release.
• Like other stannous salts it can be moderately toxic; waste disposal should follow local regulations for tin compounds.
• Its properties — coordination flexibility, lone-pair chemistry and redox behavior — make it useful for both preparative chemistry and fundamental studies of p-block element bonding.

For summaries, technical data and safety sheets consult specialized chemical resources and material safety data sheets via reference links such as oxidation state reviews or supplier documentation (general compound pages, tin information, halide chemistry).